Inventories (Tables)

3 Months Ended

Mar. 31, 2023

Inventories [Abstract]

Inventory Amounts by Product Type

Our inventory amounts by product type were as follows at the dates indicated:

	March 31, 2023		December 31, 2022
NGLs	$	1,643	$	1,689
Petrochemicals and refined products		201		430
Crude oil		335		411
Natural gas		16		24
Total	$	2,195	$	2,554

Cost of Sales and Lower of Cost or Market Adjustments

Due to fluctuating commodity prices, we recognize lower of cost or net realizable value adjustments when the carrying value of our available-for-sale inventories exceeds their net realizable value.  The following table presents our total cost of sales amounts and lower of cost or net realizable value adjustments for the periods indicated:

	For the Three Months Ended March 31,
	2023			2022
Cost of sales (1)		$	9,331		$	10,098
Lower of cost or net realizable value adjustments recognized in cost of sales			7			4

(1) Cost of sales is a component of “Operating costs and expenses” as presented on our Unaudited Condensed Statements of Consolidated Operations.  Fluctuations in these amounts are primarily due to changes in energy commodity prices and sales volumes associated with our marketing activities.